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Cosmetic ingredient dictionary

Imidazolidinyl Urea in cosmetics: what it is and what it does

Imidazolidinyl Urea is a cosmetic ingredient that keeps the product from spoiling. The EU lists it as an allowed preservative, with a maximum amount. Open Beauty Facts finds it in 57 products, most often shampoos.

By Bravoora teamUpdated Sources checked 3 sourcesHow we check

What does Imidazolidinyl Urea do in a product?

In a cosmetic product, Imidazolidinyl Urea keeps the product from spoiling. The EU’s CosIng database lists this job for it: preservative.

preservative

What other names and numbers does Imidazolidinyl Urea have?

CAS number
39236-46-9
EC number
254-372-6
CosIng reference
34567

Is Imidazolidinyl Urea restricted in the EU?

It is allowed, on a list with limits. The EU lists it as an allowed preservative, with a maximum amount (Annex V of Regulation 1223/2009, entry 27).

The annex entry sets the exact limits, the products it may be used in and any warning the label must carry.

Which products contain Imidazolidinyl Urea?

Open Beauty Facts finds Imidazolidinyl Urea in the ingredient lists of 57 of the 22,021 products it has a list for, most often shampoos, hair care and cleansers.

  • Shampoos6
  • Hair care5
  • Cleansers3
  • Face care3

Products with it, by country of sale: France 20 · Spain 6 · United States 6 · Argentina 3.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Imidazolidinyl Urea turns up, not how much of the market it is.

On these listsPreservatives

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors

Sources

The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
  3. EU Regulation 1223/2009 on cosmetic products (the annexes)

Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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